Spinning chimney

ABSTRACT

In a spinning chimney comprising side plates and a back plate such a manner that a front part of the chimney is opened, in which extruded filaments are quenched and solidified by a stream of fluid blown in a direction from the back plate to the front part of the chimney through a screen; a plate at one end is swingably spanned with both front ends of said side plates, and said plate at the other end reclined slantly against the screen in order to remove waste filaments therefrom during the start-up of the spinning operation.

[451 Mar. 21, 1972 United States Patent Yamada et al.

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[73] Assignee: Teijin Limited, Osaka, Japan Primary ExammerRobert D.Baldwin Oct. 17, 1969 Assistant Examiner-Michael 0. Sutton 867,130Attorney-John Lezdey [22] Filed:

[2]] Appl. No.:

ABSTRACT In a spinning chimney comprising side plates and a back plate[30] Foreign Application Priority Data Oct. 25, 1968Japan..................... ............43/93141 v a manner that a Partchimney is which extruded filaments are quenched and solidified by astream of fluid blown in a direction from the back plate to the frontpart of the chimney through a screen; a plate at one end is swingablyspanned with both front ends of said side plates.

and said plate at the other end reclined slantly against the screeninorder to remove waste filaments therefrom during the start-up of thespinning operation.

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[58] Field of Search..........,..........l8/8 QM, 8 OD; 264/176 F 2Claims, 4 Drawing Figures References Cited Patented March 21, 1972INVENTORS Ruzo AS DA AND BI YAMADA V1 E W n A SPINNING CHIMNEY Thisinvention relates to a spinning chimney for quenching and solidifyingfilaments extruded through a spinneret from molten filament-formingpolymeric materials, and more particularly it relates to startupspinning chimney for removing waste filaments therefrom during thestart-up of the spinning operation. 7""

In a meltspinning apparatus for producing a synthetic fiber from amolten filament-forming material, it is important that filamentsextruded through a spinneret are uniformly quenched and solidified by astream of fluid in a spinning chimney to obtain filaments having aconstant denier and uniform dyeing properties along the length thereof.Therefore,

. just under the spinneret extruding filaments there is generallyprovided a spinning chimney in which a stream of fluid for quenchingsaid filaments blows.

Various types of this spinning chimney are well known in the art. As onetype of this spinning chimney is a chimney whose front chimney isopened, whereby a stream of fluid such as air, inert gas,etc., is blownagainst extruded filaments from the back part of the chimney to thefront part thereof so that said filaments can be quenched andsolidified. The aforementioned type of the chimney is known what iscalled as a side-blow spinning chimney and widely available for its easyhandling.

This invention is concerned with an improvement of this type of thespinning chimney. In a continuous operation of the melt-spinning fororganic filament-forming compositions, it comes to be necessary toexchange a spinning pack for new one when some troubles have beenencountered in breakage of monofilament, kneeling or bending phenomena,leakage of molten polymer from seal parts of the spinning pack, andincrease of the spinning pack pressure. In the case of exchanging thespinning pack or mounting a new pack before the beginning of thespinning operation, it is necessary to extrude molten polymer for a timeenough to exhaust the air from the spinning pack, and also keep extrudedfilaments up to desired temperature. During that period, waste filamentsare extruded so that such waste filaments must be removed from thechimney. Moreover, it is also necessary that extruded filaments are cutoff below the spinneret when the trouble of a winding machine orabnormality of the temperature of molten polymer is occurred. If suchwaste filaments are dropped and passed through the lower part of thechimney, undesired effect has been found in that yarn guides are broken,and oiling rollers and a winding machine are entangled with thefilaments. Therefore, it is necessary to provide in the chimney areceiver for receiving waste filaments.

Conventionally a receiver was horizontally mounted in the spinningchimney so that waste filaments extruded through a spinneret areaccumulated on said receiver. As a result, it became necessary that whenthe receiver was fully accumulated with waste filaments, the receiverhad to be exchanged for new one with the result that the exchangingworks were ultimately troublesome.

It is therefore the object of this invention to provide a spinningchimney having simple means for removing waste filaments with extremeconvenience.

This object is accomplished according to this invention which provides aspinning chimney comprising sideplates and a backplate such a mannerthat a front part of the chimney is opened, wherein extruded filamentsare quenched and solidified by a stream of fluid blown in a directionfrom the back part to the front part of the chimney through a screenpositioned between the backplate and said filaments, characterized inthat a plate at one end is swingably spanned with both front ends ofsaid sideplates, and said plate at the other end reclines against thescreen so as to be slant.

For a full understanding of the invention, a detailed description of thespinning chimney embodying the invention in a preferred form will now begiven in connection with the accompanying drawings and the featuresforming the invention will be specifically pointed out in appendedclaims.

In drawings;

FIGS. 1 and 2 are front and sectional views of the conventional spinningchimney respectively.

FIGS. 3 and 4 are front and sectional views of the spinning chimneyaccording to this invention.

Referring now to a conventional spinning chimney in FIGS. 1 and 2,numeral 1 designates a spinning assembly under which a spinning chimney2 is provided interposing a heat insulting plate 3 therebetween. Saidspinning chimney 2 comprises sideplates 4, 5 and a backplate 6 such amanner that a front part of the chimney 2 is opened. A screen 7 ispositioned between the backplate 6 and filaments 8 which are extrudedthrough the spinneret 9 housed in the spinning assembly I so as toconstitute a plenum chamber 10. A stream of fluid such as air, inert gasand the like is blown against filaments 8 in a right direction tofilaments 8 from the backplate 6 to the front part of the chimney 2through the screen 7 by way of the plenum chamber 10. A duct 1 l isfixed to the lower end of the chimney 2 for guiding a stream of fluidand filaments 8. On the inner surface of both sideplates 4, 5 areprovided rails 12 on which a receiver 13 is mounted horizontally so thatfilaments 8 extruded through a spinneret 9 are accumulated on saidreceiver 13. When the receiver 13 is accumulated with full wastefilaments 8, it must be exchanged for new one. Therefore, the exchangingworks as well as the preparation of the receiver are ultimatelytroublesome.

In this invention, these troubles are eliminated by providing a spinningchimney having simple means which are hereinafter described.

Supporting means 14 and 14 are fixed to the lower end of the side plates4 and 5 respectively, extending from the front part of the chimney 2. Onthe supporting means 14, 14 is swingably mounted a bar 15 which issecured to one end of plate 16 which is necessarily so long as torecline against the screen 7 at the other end of the plate 16 and toform a slope on which filaments 8 can slip down. The plate 16 is also sowide as to make a swing motion between the side plates 4, 5.

At the beginning of the spinning operation, when a number of wastefilaments 8 issued from the spinneret 9 are removed from the spinningchimney 2, the plate 16 is set to recline against the screen 7 at theother end as in FIG. 4 so that when said waste filaments 8 fall on theplate 16, they slip down by their weight along the plate 16 and thusfall on the front floor of the chimney 2. Hence, according to thisinvention it is not necessary at all to do the troublesome work forexchanging the receiver like the conventional chimney. When filaments 8come to be normally extruded, the plate 16 is swung to a position shownin dotted line by means of such as tools, etc., not shown so thatfilaments 8 pass through the chimney 2 and the duct 11 onto the bobbinwhereby they are wound up. Hence, when the the plate 16 is swung tolocate at the position parallel to the duct 11, it does not stand in theway of the spinning operation.

The reclining angle of the plate to the horizontal plane is preferablymore than 30 when the plate relines against the screen. If said angle isless than 30, difficulties are encountered in that waste filamentsaccumulated on the plate do not slip down by their weight from the plateso that the provision of the plate is not significant at all.

As aforementioned, the spinning chimney of this invention has anadvantage of simplicity thereof while overcoming the conventionaldefects.

Although this invention has been described with reference to specificembodiments thereof, it will be appreciated that many variations may bemade without departing from the scope of this invention.

We claim:

1. A spinning chimney for crossflow quenching of extruded filamentscomprising a back plate; a screen positioned between said back plate andsaid extruded filaments for introducing quenching fluid therethroughinto said chimney; a pair of side plates spaced in parallel and securedto said back plate to form at the opposite side of said back plate anopening for the passage of quenching fluid out of said chimney, and aplate for removing waste filaments pivotally mounted on lower and frontparts of said side plates, said plate being slantingly normal filamentsare extruded.

reclined against said screen so as to intercept the passage of 2. TheSpinning chimney according to claim 1 wherein said the'extrudedfilaments for moving the waste filaments from Plate for removing wastefilaments is slantingly reclined more said chimney when the wastefilaments are extruded, and than being pivoted out of passage of theextruded filaments when 5

1. A spinning chimney for crossflow quenching of extruded filamentscomprising a back plate; a screen positioned between said back plate andsaid extruded filaments for introducing quenching fluid therethroughinto said chimney; a pair of side plates spaced in parallel and securedto said back plate to form at the opposite side of said back plate anopening for the passage of quenching fluid out of said chimney, and aplate for removing waste filaments pivotally mounted on lower and frontparts of said side plates, said plate being slantingly reclined againstsaid screen so as to intercept the passage of the extruded filaments formoving the waste filaments from said chimney when the waste filamentsare extruded, and being pivoted out of passage of the extruded filamentswhen normal filaments are extruded.
 2. The spinning chimney according toclaim 1 wherein said plate for removing waste filaments is slantinglyreclined more than 30*.